Yeah it is important not to mix up those connectors.
The ones people sometimes mix up are the IACV and the purge cut solenoid valve, maybe even the IAT
Correct wiring colors are:
IACV-blue/black & yellow/black wires
purge cut solenoid valve-red &yellow/black
IAT-green/white & red/yellow

This is all from memory but I'm pretty sure its correct. If you have something in the wrong place, put it in the right place. then see if it runs right; if it doesn't then try a new obd1 p75, they are pretty cheap. You probably have a "meteor strike" looking spot on the back of your ecu cover where you fried the voltage regulator in your ecu though.